Audio speaker unit



FIG. 1 is a side elevational view of an audio speaker unit according to the present design, the side opposite being identical;

FIG. 2 is a right end elevation view thereof;

FIG. 3 is a left side elevation view thereof; and,

FIG. 4 is a top plan view thereof, the bottom being unornamented. 

The ornamental design for an audio speaker unit, as shown and described. 